From c3363458452f7823b4dd6ed8a827a7c3886092ed Mon Sep 17 00:00:00 2001
From: Fabian Schieder <fabian.schieder.1010@gmail.com>
Date: Wed, 18 Mar 2026 16:07:44 +0100
Subject: [PATCH] feat: dynamically determine URL column in offers table to
 prevent errors

---
 productpage.php | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/productpage.php b/productpage.php
index bae9d3d..f3f671d 100644
--- a/productpage.php
+++ b/productpage.php
@@ -238,8 +238,23 @@ $productId = isset($_GET['id']) ? (int)$_GET['id'] : 0;
     </div>
 
     <?php
+        // Unterschiedliche DB-Stände: URL-Spalte heißt je nach Schema z.B. productURL oder offerURL.
+        // Wir ermitteln die existierende Spalte dynamisch, damit die Seite nicht mit "Unknown column" crasht.
+        $urlColumn = '';
+        $colCheck = mysqli_query($conn, "SHOW COLUMNS FROM offers LIKE 'productURL'");
+        if ($colCheck && mysqli_num_rows($colCheck) > 0) {
+            $urlColumn = 'productURL';
+        } else {
+            $colCheck2 = mysqli_query($conn, "SHOW COLUMNS FROM offers LIKE 'offerURL'");
+            if ($colCheck2 && mysqli_num_rows($colCheck2) > 0) {
+                $urlColumn = 'offerURL';
+            }
+        }
+
+        $urlSelect = $urlColumn !== '' ? ("offers." . $urlColumn . " AS offerURL") : "'' AS offerURL";
+
         $stmt = mysqli_prepare($conn,
-                "SELECT price, shippingCost, inStock, shops.name, offers.productURL, shops.logoPath, shops.shippingTime
+                "SELECT price, shippingCost, inStock, shops.name, $urlSelect, shops.logoPath, shops.shippingTime
                         FROM offers 
                         INNER JOIN shops ON 
                         offers.shopID = shops.shopID WHERE offers.productID = ? ORDER BY offers.price ASC");